Hays, S. P. (1957). The response to industrialism, 1885-1914. University of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Hays, Samuel P. The Response to Industrialism, 1885-1914. Chicago, Illinois: University of Chicago Press, 1957.
Lua MLA (9ú heag.)Hays, Samuel P. The Response to Industrialism, 1885-1914. University of Chicago Press, 1957.
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